Which risk significantly increases when coastal upwelling currents weaken during an El Niño event?

💡 Explanation

When upwelling weakens, nutrient-rich deep water is no longer transported to the surface because the trade winds decrease, impacting phytoplankton growth, triggering decline in marine primary productivity. Therefore decrease in bioproductivity results, rather than increased erosion, landslides, or dead zone expansion, that related a different specific El Nino consequences.

• Which mechanism causes tsunami formation during a subduction zone earthquake with significant vertical displacement?
• Which outcome occurs when the Earth's rotation weakens gyre circulation?
• Which outcome typically occurs when a transform plate boundary impedes subduction?
• Which mechanism causes increased phytoplankton productivity due to upwelling circulation?
• Which atmospheric effect causes the Somali Current along East Africa to reverse direction seasonally?
• Which outcome results when melting permafrost destabilizes slopes?